Automobile lamp



G. F. JACB AUTOMOBILE LAMP Filed March 17, 1927 Patented Sept. 11, 1928.

UNITED sures GEORGE LE. JACOB, OIE EVANSTON, ILLINIS.

AUTOMOBILE LAME.

Application filed March 17, 1927; Serial No. 176,134.

This invention pertains t0 impr0 vements in automobile head lights. More particularly it has reference to an arrangement of light refiecting surfaces disposed in a peculiax manner within a lamp body.

The main object of the invention is to s0 arrange a light reflectingsurface in an automobile lamp that the light rays Wlll be oast mainiy at an angle downwardly upon the road rnther than in a horizontal direction, or in an upward direction.

Another object is to provide a single refiector unit preferably oi stamped metal ti 1at may be instailed in any lamp body oy winch the advantages of my system may be demved.

The ebove objects and the advantages to be had Wili be expiained fully in the following speoifieation aided by the accompa1iying drawing wherei n Figure 1 is a longitudinal SGCIOD&I elevatien of en automobile lamp Constructed 21ccording t0 zny invention.

Figure 2 is a front eievation et the samo.

Figure 3 illustrates in perspective a one piece refioctor constructed according to my invention, and

Figure 4 is a longitudinal sectionsl elevation oi: parts of a lanop body and reflector iliustrating means for securing the refiector in position on sziid body.

in the figures the oharacter 1 denotes a iamp body or casing which in 'this instance is ms the called drum type which includes tiie usuel lens 2 oiosing the front and heid in place by an form or" ring oi coller 3.

A retieotor 1s mounted within the casing coixsisting of a dished portion 4 of any one of the general orms, or paraboiio, the same being mounted upon the floor of the body 1 as denoted in Figure 1 and in a way tube described ater. The front side of the said portion 4, or that iying nearest the 1ens 93 is, however, eonstruoted with a verticei wali 5 or a Wil the plane oi5 WhiCii pnraiiels the axis of the said portion, iying quite close to said axis and eonsequently ciose to the iemp Seid Wnii znay include en einsion to iie opposite the fiiement o;t the iamp so to prevent the raye, of the same passing throng ti1e iens 2.

Extendin rozn the rear edge of the portian 4 or tmt direetiy opposite the wail 5 is a fiat refiector portion 8 which is on integrl part of the Whole. Said refiector por tien is designed to lie et en angle of substuntially 45 to the longitudinal axis of the body 1 and at an angle to the axis of the portion 4 as may be seen in Figure 1. In order that said portion 8 may present a neat appearance it preferably must conform 1to the cylindrical wall of the body 1. This requires, of course, that it shall partake of a somewhat elliptioal form of outline due to the fact that it has an angular position with respect to said body. Viewed from the front, therefore the ed e of that portion Will abat against the cylindrical wall of the body in :1 neat and snug manner.

In Figure 4 is shown a structure of simple but effective form for securing the refloctor unit in place. The portion 4 is' peri'orated as usual at 9 and the body 1 is pertoratod at 10 and through these is inserted a tubular flanged member 11. The fiange member engages upon the portion 4 while a nut 12 surewed upon the member serves t0 clamp the parts firmly together. A tube 13 is slidable in the member 11 and may be secured by a screw 14 in the latter, the base of the iamp being held in ony usuel manner in said tube. This provides for easily placing the refiector unit in position and firmly securing it in pince.

The portion 8 of the refieotor may be heid in any suitabie manner et its upper ree edge and it may be adjusted to any desired angle oy bending it at its place et. joining wth the portion 4.

it is observed that the ii ht rays are reflected mainiy downwnrd through the 1ens 2, and none are refiected upwardly. '1he refection of the lamp fiiament upon the portion 8 is weil up toward the top edge of that member and due to the fact thatsaid edge of the portion 8 is stationed 9 somewhat back from the ions 2 the iamps image wili not shine in the eyes of an oncoming driver Whose eye is well ebove the rofiector, and especiaiiy since a siight downward tilting of the lump body or casing 1 can be resorted t0.

As arrnnged, practicaliy all of the light is reflected from the portion 8 and it is thrown upon the road et a renter or less distance in front of the veh1cle depending upon the tiit of the portion 8, the tilt of the lump body, or both.

There is no glare of iight at eny single point but rather a fiat and even distribution thereof. Since the wali 5 of the portion 4 et en angie is vertical and Close to the lamp 7 few if any rays will be refiected thorefrom against the portion 8.

I daim:

5 As an article of manufacture, a 1efiector unit formed from a single piece of metal comprising a portion of a segment of a hol- 10W spherical body part of Which is a straight V2111 pmalleling its axis fo1ming 1 one of the reflecting portions of said body,

and having an opening in its wail et snid axis, said segment including an integral fiat rcfleoto'r portion extending from that edge the1eof directly opposite the said straight wall and overhanging said opening, the said fiat reflector portion and the said Straight wall 1ying at opposite sides of the body.

In testimonywhereof I afiix my signature.

GEORGE F. JACOB. 

